Many are questioning Nokia's decision to make the Lumia 920 an AT&T exclusive given its dreadful position in the U.S. market, but that isn't stopping the smartphone company from going "full steam ahead" with its one-carrier strategy. WPCentral noted today that Best Buy is now taking pre-orders for the Lumia 920 at $149.99 with a new, two-year contract. Those that wish to purchase the device unsubsidized will have to fork over $599.99.